Top 10 most polluted Chinese cities in May
- By Lu Na
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E-mail China.org.cn, June 28, 2013
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PM2.5 concentration/cubic meter:81 micrograms
PM10 concentration/cubic meter:129 micrograms
SO2 concentration/cubic meter:26 micrograms
NO2 concentration/cubic meter:51 micrograms
Ratio of days reaching the standard:25.8 percent
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